Swift spin a view

We want to spin a view like button, image, use this code.

let rotationAnimation = CABasicAnimation(keyPath: "transform.rotation")

rotationAnimation.fromValue = 0.0

rotationAnimation.toValue = Float(M_PI * 2.0)

rotationAnimation.duration = 1

rotationAnimation.repeatCount = Float.infinity

image.layer.addAnimation(rotationAnimation, forKey: nil)

Change duration value to spin faster or slower.

Change repeatCount to a number for certain spin time.

rotationAnimation.repeatCount = 2

Want it swing like a teeter, change code to.

rotationAnimation.fromValue = -1.0

rotationAnimation.toValue = Float(1)

rotationAnimation.duration = 1

rotationAnimation.repeatCount = Float.infinity

rotationAnimation.autoreverses=true

To speed up, add this line.

rotationAnimation.speed=3.0